package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    //员工登录
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();
        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);
        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            //MessageConstant.ACCOUNT_NOT_FOUND：这是一个常量，通常定义在 MessageConstant 类中，表示“账户未找到”的错误信息。
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        //密码比对
        // 对前端传来的明文密码进行加密，再和数据库中的密文密码进行比对
      password=DigestUtils.md5DigestAsHex(password.getBytes());
        //密码错误
        if (!password.equals(employee.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        //账号被锁定
        if (employee.getStatus() == StatusConstant.DISABLE) {
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    //新增员工
    public void add(EmployeeDTO employeeDTO){
        Employee employee=new Employee();
        //对象属性拷贝
        //将 employeeDTO(数据源对象) 中的每个属性的值赋给 employee（目标对象） 中对应的同名属性。
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号状态(默认为1)
        employee.setStatus(StatusConstant.ENABLE);
        //密码加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人id和修改人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.add(employee);
    }

    //条件分页查询
    public PageResult findByPage(EmployeePageQueryDTO employeePageQueryDTO){
        //可以动态设置limit 和 offset
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        List<Employee> employeeList=employeeMapper.findByPage(employeePageQueryDTO);
        Page<Employee> p=(Page<Employee>) employeeList;
        return new PageResult(p.getTotal(),p.getResult());
    }

    //启用和禁用员工账号
    public void status(Integer status, Long id){
        //第一种方式
//        Employee employee=new Employee();
//        employee.setStatus(status);
//        employee.setId(id);
        //第二种方式
       Employee employee= Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }

    //根据id查询员工
    public Employee getinfoById(Long id){
        Employee employee =  employeeMapper.getinfoById(id);
        employee.setPassword("****");//传给前端的密码是****，更安全
        return employee;
    }
    //修改员工信息
    public void update(EmployeeDTO employeeDTO){
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());//设置修改时间
//        employee.setUpdateUser(BaseContext.getCurrentId()); //设置修改人id
        employeeMapper.update(employee);
    }
}
